Circuit-breaker.



J. D. BRADFORD & B. R. MOORE.

CIRCUIT BRBAKBR.

lAPPLIOATIOJSVIILIII) MAB. 21, 1910.

990,431()A Patented Apnz, 1911.

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JOI-IN D. BRADFORD AND BENJIMAN R. MOORE, OF SACRAMENTO, CALIFORNIA.

CIRCUIT-BREAKER.

Specification of Letters Patent.

Patented Apr. 25, 1911.

Application filed March 2l, 1910. Serial No. 550,686.

.To all whom it 'may concern:

Be it known that we, JOI-1N D. BRADFORD and BENJIMAN R. Moolen, citizensof the lfnited States, residing at. Sacramento, in the county ofSacramento and State of California, have invented certain new and usefulImprovements in Circuit-Breakers, of which the following is aspecification.

This invention relates to circuit breakers for electrical conductors,such as power, telegraph and like lines, and the principal object of thesame is to provide a circuit breaker in which the power line is retainedin engagement therewith by the tension of the line, but which may beautomatically released therefrom in the event of said line becomingbroken, so that the said line will drop and the circuit therethrough bebroken.

ln carrying out the objects of the invention generally stated above itwill be understood, of course, that the essential features thereof arenecessarily susceptible of changes in details and structuralarrangei'nents, one preferred and practical embodiment of which is shownin the accompanying drawings, wherein Figure l is a view in sideelevation of the improved circuit breaker. Fig. ll: is a similar viewshown partly in section to show the wire connections therewith. Fig. HIis a bottom view.

Referring to said drawings by numerals, l designates the body of theimproved circuit breaker that is hollow and has a closed flat top 2which is equipped with a knob by means of which the circuit breaker maybe suspended from a telegraph pole or other conductor supports. At oneend, said body merges into an elongated tapering extension lthroughwhich a longitudinal opening 5 is formed that communicates with thehollow body. A wire 6 extends through said opening 5 and has its innerend hooked or otherwise suitably fastened to the end wall of the hollowbody 1 adjacent the said opening, as is indicated at 7. The bottom ofthe hollow body 1 is open and preferably merges into the end extension 4on an easy incline. The forward end of body 1 is partly closed by an endwall 8, the lower portion of which is beveled as indicated at 9 and isprovided with a central longitudinal slot 10 that communicates with theopen bottom portion of body 1. A plug 11 is fitted loosely within thebody 1 and is provided with a beveled lower forward portion 12 thatnormally rests on the beveled portion 9 at the forward end of body 1.The line wire 13 extends through slot 10 of the beveled portion 9 ofbody 1 and is suitably fastened to plug 11. Plug 11 is of a size topermit it being freely passed through the open bottom of body 1 and isnormally held to its seat on the beveled portion 9 or body 1 by thetension of wire 13. It will therefore be apparent that should wire 13become broken, the tension on plug 11 will be removed, whereupon saidplug will drop from body 1 so that the circuit will be broken and theportion of wire 13 that falls with the plug will be dead.

if That we claim as our invention is 1. A circuit breaker comprising ahollow body portion, said body portion terminating in a solid taperedend provided with a longitudinal opening, the bottoni portion of saidbody being open, the end wall of said body being provided with a slot, awire extending through said longitudinal opening and secured therein, aplug fitting within said hollow body portion and provided with anopening registering with said slot, and a second wire passing throughsaid slot and opening, and secured to said plug.

2. A circuit breaker comprising a hollow body portion, said body portionterminating in a solid tapered end provided with a longitudinal opening,the bottom portion of said body being open, the end wall of said bodybeing provided with a slot, and a plug fitting within said hollow bodyportion and provided with an opening registering with said slot.

ln testimony whereof we affix our signatures in presence of twowitnesses.

JOHN D. BRADFORD. BENJIMAN R. MOORE.

fitnesses LOUISE OORBY, H. H. MULL.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

